I just made my first setup of RoR, and creating a new application works

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Asked: May 20, 20262026-05-20T01:52:05+00:00 2026-05-20T01:52:05+00:00

I just made my first setup of RoR, and creating a new application works

0

I just made my first setup of RoR, and creating a new application works fine. But when I want to run the rails server I get the following error:

C:/Ruby192/lib/ruby/gems/1.9.1/gems/delayed_job-2.1.3/lib/delayed/yaml_ext.rb:30:in ‘remove_method’: method ‘to_yaml’ not defined in Class (NameError)

I ran the “bundle install” in the app directory and installed all the necessary files (with some problems however, but I excluded the gems with problems in the gemfile) and the last bundle install said that I have successfully installed all the needed packs.

I’m lost and I can’t find a similar error on the internet. Can you help me?

EDIT: I forgot to mention that I’m not having a problem with a new application. It’s running an existing one (that I didn’t build, but works fine for others) that the error is related to. Here’s the gemfile for that app:

source 'http://rubygems.org'

gem 'rails', '3.0.3'

gem 'mysql'

gem "haml", ">= 3.0.0"
gem "haml-rails"
gem 'simple_form'
gem 'delayed_job'
#gem 'auto_crawlers'
gem 'will_paginate', '~> 3.0.beta'

group :test do
  gem 'factory_girl_rails'
  gem 'mocha'
end
group :development do
  #gem "nifty-generators", "0.4.3", :git => "git://github.com/JonasNielsen/nifty-generators.git"
  gem 'fastercsv'

end
gem "mocha", :group => :test

Do you think the error is because I left out the two gems with “#” ? Those were causing problems at first, and I don’t think I need them to test some minor changes in the app (some views that I have to modify)